Textured core and method of forming same



Jan. 9, 1968. c. 1.. ROEDIGER 3,362,655 v I TEXTURED CORE AND METHQD OF FORMING SAME Filed Sept; 19, 1966 CHARLES L. ROED ATTORNEY United States Patent M 3,362,655 TEXTURED CORE AND METHOD OF FORMING SAME Charles L. Roetliger, 322 Liberty St., PA). Box 4140, Winston-Salem, N.C. 27105 Filed Sept. 19, 1966, Ser. No. 580,249 6 Claims. (Cl. 242118.32)

ABSTRACT OF THE DISCLOSURE A tubular winding core including a supporting tube and a thin outer ply of pre-ribbed material wound thereon, the ply being of the same thickness throughout. The longitudinal edges of succeeding convolutions of the outer ply form a seam whereby due to the thin size of the outer ply, snagging of yarn at the seam is prevented without the necessity of sanding, skiving, or otherwise finishing the seam.

This invention relates to winding cores and more particularly to an improved form of winding core or tube having a textured surface to facilitate the winding and subsequent handling of yarn, paper, cloth, and the like, and to the method of forming such a core.

Cores having smooth outer surfaces are unsatisfatcory in certain instances in that the material being wound will not pick-up or start easily and uniformly onto a core with a smooth outer surface. Also, the material is more likely to slip lengthwise along a core having a smooth outer surface. This is known as sloughing, i.e. slipping off the winding core after the material has been wound.

Various attempts have been made in the indusry to produce cores or tubes which do not have this undesirable characteristic. A textured surface is known to be beneficial in starting the first several layers of material onto the core because it holds the first convolutes of yarn against axial slippage. If the first few layers are wound smoothly and uniformly, the resulting full package will be satisfatcory. One example is to spray or otherwise apply latex or some other slip-resistant material to the core while or after it has been formed. Another example is shown in Patent No. 2,273,373 where the winding core has moulded into its outer surface a series of ribs. These attempts to provide a desirably textured surface both require additional manufacturing operations, thereby adding to the expense of the core. Other attempts include the use of flocking, sanding or embossing, which may comprise a special embossed outer wrap which is both expensive and difficult to use since the paper must be of a suitable thickness (approximately .012") to adequately receive the special design imprint. The edges of the embossed overwrap of such a thickness must be sanded or skived to a fine taper at the overlapping seam when the core is to be used in forming a yarn package. Otherwise, an upstanding edge would hinder the wrapping or taking-off process.

According to the present invention, a preformed textured surface is provided on a winding core by spirally winding a length of very thin ribbed kraft paper, which is commercially available, or some other suitably thin and textured flexible material around a tubular base member. The trailing edge of each successive convolution preferably overlaps the leading edge of the preceding convolution, but the thinness of the material (about .004") enables a satisfactory seam to be formed without skiving or sanding, while permitting fine denier yarn or like products to be wound without getting caught or trapped at the seam formed by adjacent convolutions.

Moreover, a ribbed paper is pro-formed on a paper making machine which insures the quality and consistent 332,655 Patented Jan. 9, 1368 evenness of the paper, whereas a sanding operation, which would appropriately bevel opposite edges, could not be controlled to produce a tube that would have as true and even adjoining edges as those of the subject invention without considerable expense and special precision machinery. The winding core thus produced may be used for wrapping a variety of commodities such as yarn, cloth, paper, ribbon, gift wrap, and other materials.

It is therefore an object of this invention to provide an improved winding core for use with a variety of materials which are packaged in a roll-like fashion.

It is a further object of this invention to provide a winding core that has a uniformly roughened, non-slip surface onto which materials may be more easily and efliciently wound and unwound.

A still further object of this invention is to provide an improved winding core that is simple and inexpensive to manufacture.

It is another object of the invention to provide a preformed textured surface of flexible material of sufficient thinness that the proximal edges of successive convolutions about a core may be overlapped without causing an objectionable seam or bulge when winding fine denier yarn.

It is a more specific object of this invention to provide a device of the type just described wherein the gauge or thickness of the said flexible material is about .004.

A still further object of the invention is to provide a tubular core and a pre-formed textured surface of flexible material supported by said tubular core.

Another object of the invention is to provide an improved method of forming a textured surface on a winding core without disturbing the balance and trueness of the core.

A further object of the invention is top rovide an improved method of forming a ribbed surface on a winding core wherein the angularity of the ribs relative to the axis of the core may be readily varied as desired.

Other objects and a fuller understanding of the invention may be had by referring to the specification and accompanying drawings in which- FIGURE 1 is a somewhat schematic view, with parts broken away, of a core being wrapped in accordance with one embodiment of the present invention;

FIGURE 2 is an elevation of a completed tube cut from the wrapped core of FIGURE 1;

FIGURE 2a is an enlarged fragmentary view of a portion of the tube of FIGURE 2 showing the textured surface;

FIGURE 3 is a view similar to FIGURE 1, but showing an alternate embodiment;

FIGURE 4 is an elevation of a completed tube cut from the wrapper core of FIGURE 3;

FIGURES 5 and 6 are elevations of other embodiments of the invention, and illustrate how the direction of the ribs relative to the axis of the core may be varied with the width of the textured wrapping ply.

Referring more specifically to the drawings, FIGURES 1 and 3 show a winding core comprising a standard paper or plastic yarn holder shown as a tube 10 Upon which is spirally wound a length of pre-formed textured outer ply shown as ribbed kraft paper 11. Core 10 may be made of paper, fiber, plastic, metal or other desired material.

The ribbed paper is preferably SO-lb. ribbed kraft paper approximately .004" thick which is commercially available, but any other suitably thin, textured, tough flexible material may be used. In FIGURES 1 and 2, the paper 11 is wound so that the trailing edge 12 of each successive convolution abuts the leading edge 13 of the preceding convolution so that a butt joint 14 is formed between adjacent convolutions. An appropriate adhesive secures the 3 pre-formed textured outer ply 1 1 to the core 10. As most clearly seen in FIGURE 2a, the ribs 15 extend above the outer surface of the outer ply 11 approximately .0015" and the total thickness of ply 11 is preferably between .0035 and .005.

The embodiment of FIGURES 3 and 4 is formed similarly to that of FIGURES 1 and 2 with the exception that the trailing edge 20 of one convolution is wra ped so that it overlaps a portion of the leading edge 22 of the preceding convolution. This forms an overlapping seam 24 which is actually preferable to the butt seam of FIG- URES l and 2. The reason for this being that the overlapped seam is easier to manufacture so that yarn or similar stranded material will not be permitted to slip down into the seam and get tangled or trapped as may happen when the butt seam 10 is used.

For normal usage the length of ribbed paper has a width of approximately three and one-half inches or any suitable width depending on the size of the core to be made. This provides a textured pattern similar to the one shown in FIGURES 2 and 4. By changing the width of the convolutions, the angle of the spiral will also thus be changed. Therefore, if a narrower width of paper 30 (approximately 2 /2 inches) were employed such as shown in FIGURE 5, the angle of the seams and ribs would become more perpendicular with respect to the longitudinal axis of the finished tube. Conversely, if a wider strip of paper 40 were used (approximately 4%. inches), as shown in FIGURE 6, the angle of the seams and ribs would change so that the ribs would become more parallel to the longitudinal axis of the tube. Thus, as can be seen, the angle of the ribs with respect to the yarn or other material being wound on the tube may be readily varied according to the width of the wrapping ply and the diameter of the core. This flexibility has the advantage of increasing the usefulness of the invention with a minimal or no increase in cost.

In the drawings and specification, there have been set forth preferred embodiments of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only and not for the purpose of limitation, the scope of the invention being defined in the claims.

I claim:

1. A tubular winding carrier comprising:

(a) a supporting core of a given diameter, said supporting core having an outer surface which is substantially smooth with respect to the finished surface of the winding carrier so as not to affect its contour,

(b) a thin outer ply on said supporting core,

(i) said ply being formed from a length of preribbed, thin flexible material of a given width between its longitudinal edges,

(-ii) a seam formed by the longitudinal edges of succeeding convolutions,

(iii) said material being of the same thickness at its longitudinal edge portions as therebetween and being thin enough with respect to said supporting core to prevent snagging of yarn on the edges of the outer ply at said seam during un- Winding,

(iv) said outer ply extending circumferentially around the supporting core; and

(c) means adhering said outer ply to said supporting core.

2. The improved winding carrier of claim 1 in which said seam is formed by the overlapping of the edges of 10 the succeeding convolutions of said outer ply.

3. The winding carrier of claim 2 wherein the seam is about .004 of an inch thick.

4. The improved winding carrier of claim 2 in Which said flexible material consists of ribbed paper approximately .004 inch thick.

5. The method of forming a tubular Winding carrier which eliminates the necessity of a skiving, sanding or surface finishing operation comprising:

(a) providing a supporting core of a given diameter having an outer surface which is substantially smooth with respect to the finished surface of the winding carrier so as not to affect its contour,

(b) selecting a length of pre-ribbed, thin, flexible material of a given width between its longitudinal edges, 25 said material being thin enough with respect to said supporting core to prevent snagging of yarn on the edges of said flexible material during unwinding,

(c) forming a thin outer ply on said supporting core by winding said length of ribbed material around said supporting core,

(d) forming a seam adjacent the longitudinal edges of succeeding convolutions of said outer ply,

(e) maintaining said edge thickness of said ribbed material substantially constant during and after said winding operation, and

(f) adhering the outer ply of ribbed material to said supporting core, whereby the step of sanding, skiving or otherwise finishing the edges is eliminated. 6. The method according to claim 5 wherein step (d) includes overlapping the edges of succeeding convolutions of said outer ply to form said seam.

References Cited UNITED STATES PATENTS 651,483 6/1900 Greenfield 13s 144 1,240,103 9/1917 Tiffany 242-11832 2,273,373 2/1942 Perry 2421:1s.32 2,476,666 7/1949 Keller 13s 144 X 2,751,936 6/1956 Dunlap et al. 242-41832 X 2,895,511 7/1959 Seltman 242 11s.32 3,095,161 6/1963 Atwood etal 242-159 OTHER REFERENCES Celanese, British patent specification No. 360,870, published 1931.

GEORGE F. MA'UTZ, Primary Examiner. 

